I don't know of any solid numbers, but you can use my synthetic bag for comparison to yours: It's an REI Nooksack UL, and has a nearly identical weight of 28 oz. (This is the manufacturer's number; I don't have a sensitive scale.) It's rated at 35 degrees. I just got it as a present and haven't used it yet.


Edited by Wolfeye (01/01/09 09:15 PM)